Question

✓(x-1)(y+2)=7
How to solve it?

Answer 1

Answer:

(x-1)(y+2)=7

xy+2x-y-2=7

2x+2xy-y-2-7=0

2x+2xy-y-9=0

Answer 2

Answer:

square both side

(x-1)(y+2)=49

factor of 49=7×7 and 1×49 and 49×1

then (x-1)= 7. and (y+2)=7

(x-1)=1. and (y+2)=49

(x-1)=49. and (y+2)=1

then values of x= 8,2,50

y=5,47,-1

both side suare

(x-1)(y+2)=49

xy+2x-y+2=49

xy+2x-y=47